CN106715035A - Laser welded joint and laser welding method - Google Patents
Laser welded joint and laser welding method Download PDFInfo
- Publication number
- CN106715035A CN106715035A CN201580050206.8A CN201580050206A CN106715035A CN 106715035 A CN106715035 A CN 106715035A CN 201580050206 A CN201580050206 A CN 201580050206A CN 106715035 A CN106715035 A CN 106715035A
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- Prior art keywords
- welding bead
- welding
- laser
- bead
- joint
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- 238000003466 welding Methods 0.000 title claims abstract description 407
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000011324 bead Substances 0.000 claims abstract description 325
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 230000015572 biosynthetic process Effects 0.000 claims description 17
- 238000005336 cracking Methods 0.000 abstract description 23
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 description 8
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 238000009751 slip forming Methods 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000003556 assay Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910000756 V alloy Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000000649 photocoagulation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/244—Overlap seam welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/035—Aligning the laser beam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/067—Dividing the beam into multiple beams, e.g. multifocusing
- B23K26/0676—Dividing the beam into multiple beams, e.g. multifocusing into dependently operating sub-beams, e.g. an array of spots with fixed spatial relationship or for performing simultaneously identical operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/28—Seam welding of curved planar seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
- B23K26/322—Bonding taking account of the properties of the material involved involving coated metal parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/08—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of welds or the like
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67144—Apparatus for mounting on conductive members, e.g. leadframes or conductors on insulating substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/0014—Monitoring arrangements not otherwise provided for
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
The purpose of the present invention is to provide: a laser welded joint having exceptional joint strength, in which annular welding beads are prevented from cracking during lap laser welding of a steel plate in which the beads are formed in multiple layers, said joint comprising welding beads solely in the quantity necessary for joint strength; and to provide a laser welding method. The present invention is a laser welded joint having exceptional joint strength, in which annular welding beads are prevented from cracking during lap laser welding of a steel plate in which the beads are formed in multiple layers, said joint comprising welding beads solely in the quantity necessary for joint strength, wherein the laser welded joint is characterized in being manufactured by a method provided with a step for stacking a plurality of metal plates and forming a first welding bead by laser irradiation, and a step for sequentially forming two or more welding beads by laser irradiation on the outside of the first welding beads, the surface hardness of the welding beads increasing from the inside beads to the outside beads.
Description
Technical field
The present invention relates to make metallic plate multiple overlap, with laser by them with the welding point of spot-shaped weld, especially
It is to be related to improve the excellent laser weld joint of its quality, strength of joint and Laser Welding while making welding bead be formed as multiple
Connect method.
Background technology
For example, in recent years, the fuel efficiency of automobile is improved to tackle and security etc. is improved requiring, on car body
Majority uses the sheet metal of high intensity, it is desirable to welded these steel plates more at high speed using laser welding.In addition, making high-strength
When degree sheet metal overlaps and carries out laser welding, expectation stably obtains the intensity at junction surface high.
Laser welding due to using laser as thermal source, therefore compared with TIG weld or MIG such as weld at the arc welding, control line
Energy is conscientiously and easy.Thus, by the irradiation power output and protective gas that suitably set speed of welding and laser beam
The welding conditions such as flow, can reduce thermal deformation.In addition, laser welding can be welded from one side, it is consequently adapted to the car body of automobile
Deng the layout welding of complicated component.
In recent years, progressively popularization carries out high speed positioning laser beam, carries out welding position in short-term by reflective mirror
Movement, efficient remote laser welding.
In remote laser welding, for example, as shown in figure 5, using welding bead 51, by the flange part 50a's of cap member 50
Multiple pads carry out laser welding.
In laser welding, if the load load-carrying on weld part, stress concentration in welding bead melt run (joint portion) with
The vicinity at the position that the overlapping portion of steel plate intersects.Therefore according to the size of load-carrying, sometimes up to fracture.
Patent document 1 discloses a kind of method for the problem, wherein, as shown in figure 4, entering in the inner side of the 1st welding bead 60
One step forms the 2nd welding bead 61, and multiple welding bead is formed as by making welding bead, is further improving the same of the bond strength of steel plate 5,5
When, the 1st welding bead 60 is tempered with the heat of the 2nd welding bead 61.Thus, the ductility of the joint portion of welding bead is improved, during physical burden
The stress concentration of overlapping portion is alleviated, and the patience relative to physical burden is improved.
Patent document 2 discloses that a kind of method, wherein, the order shape of welding bead, temper bead/ annealing bead is assigned with main weldering road, compression domain
Into 3 welding beads, the cracking of welding bead is prevented.
Prior art literature
Patent document
Patent document 1：International Publication No. 2012/050097
Patent document 2：Japanese Unexamined Patent Publication 2012-240086 publications
The content of the invention
Problems to be solved by the invention
As Patent Document 1, formed in the case that many important places carry out laser welding to steel plate in the welding bead for making ring-type,
When the inner side of the 1st welding bead forms 2 welding bead, the material or the size of welding bead of the steel plate according to welding, sometimes in the welding bead of inner side
Generation longitudinal cracking.
On the weld part for ftractureing during load load-carrying, at the position that the melt run of welding bead is intersected with the faying surface of steel plate
The value of stress of neighbouring generation increase compared to without situation about ftractureing.As a result, it is difficult to ensure relative to steel
The intensity and the intensity of the load-carrying relative to peeling direction of the parallel shearing load-carrying of the faying surface of plate.
In patent document 2, in the case of the deficiency of the strength of joint with 3 bicirculars, the 3+ as 5 bicirculars, 7 bicirculars is formed
The welding bead of the tediously long number of 2n (n is more than 0 integer) bar, it is necessary bar number to form over for ensuring strength of joint
Welding bead.
Now, in the case that the position of limited area is welded as by flange, due between welding bead it is mutual away from
From determination, the welding bead that will have been impacted once is welded again.As a result, causing the thickness in the thickness of slab direction of welding metal by sputtering
Degree is reduced, further, since excessive heat input, heat affected zone softens, and has the shortcomings that strength of joint is reduced.
In view of the foregoing, its problem is the present invention, there is provided swash in the overlap for forming the steel plate of multiple ring-type welding bead
In photocoagulation, prevent that cracking and the joint being made up of the welding bead of only necessary bar number for butt joint intensity occur in welding bead
The laser weld joint and method for laser welding of good strength.
For the method for solve problem
The present inventors in using the laser welding of the metallic plate of multiple welding bead, in order to prevent inner side weldering as described above
The cracking in road, the occurrence cause to ftractureing is studied.
Result finds, in the case that outside-in sequentially forms the welding bead of ring-type or open loop shape, the welding bead hair in inner side
Raw cracking ftractures for solidification, and the stretching residual stress produced during the welding in outside produces influence to solidification cracking.
It is thus seen that, when multiple welding bead is formed, by sequentially forming the welding bead of ring-type or open loop shape from Inside To Outside,
Can prevent welding bead cracking form multiple welding bead.In addition, it is found that when forming the welding bead of inner and outer by regulation when
Between be spaced, or the welding bead of an inner and outer part is overlappingly welded, welding point enters for the patience of physical burden
One step is improved.
The present invention is further studied based on such opinion, and its purport is as follows.
(1) a kind of laser weld joint, it is characterised in that be the welding that multiple metallic plates for overlapping are welded
Joint, the welding bead of ring-types or open loop shape with the 3 weight above, the case hardness of welding bead is from the welding bead of inner side welding bead laterally
Increase.
(2) a kind of method for laser welding, it is characterised in that be by the way that by metallic plate, multiple overlap and irradiate laser, it is multiple
Landform circlewise or open loop shape welding bead, so as to the method for laser welding that is welded to one another the metallic plate of overlap, possess：By swashing
The irradiation of light and form the operation of the 1st welding bead of ring-type or open loop shape；With in the outside of above-mentioned 1st welding bead, by the photograph of laser
Penetrate and further from Inside To Outside sequentially form 2 weight the above ring-types or open loop shape welding bead operation.
(3) according to the method for laser welding of above-mentioned (2), it is characterised in that in the formation finish time of the welding bead from inner side
After beginning to pass through more than 0.5 second, start the formation of the welding bead on the outside of it.
(4) according to above-mentioned (2) or the method for laser welding of (3), it is characterised in that above-mentioned metallic plate is that C content is 0.8%
Following steel plate, the temperature for being formed in the welding bead on the inside of it of the later welding bead of the 2nd weight starts after reaching less than -50 DEG C of Ms points.
(5) according to the method for laser welding of any one of above-mentioned (2)~(4), it is characterised in that with above-mentioned 1st welding bead with
Any one nonoverlapping mode in the welding bead formed on the outside of it is formed.
(6) according to the method for laser welding of any one of above-mentioned (2)~(4), it is characterised in that the welding bead that outermost is formed
Formed in the mode Chong Die with the welding bead part on the inside of it.
(7) according to the method for laser welding of any one of above-mentioned (2)~(6), it is characterised in that welded by remote laser
Carry out the formation of above-mentioned welding bead.
Here, the welding bead of ring-type refers to：The track of welding bead is circle, Long Circle, ellipse, polygon or at them
A part on there is the shape of necking part, the track of welding bead is continuous, and the welding bead is around specific scope.In addition, open loop shape
Welding bead refer to：The track of welding bead is circle, Long Circle, ellipse, polygon or has necking down in their part
The shape in portion, the line segment of the path portion ground comprising discontinuous portion and the welding bead and connection welding bead and welding bead of welding bead is around spy
Fixed scope.
In addition, the external diameter of welding bead refers to, and on the line of the fusion weld wiring (toe of the weld portion) on the outside of connection welding bead, connection
The maximum length of the line segment between arbitrary 2 points.
Invention effect
According to the present invention, in the overlapping laser welding for forming the metallic plate of welding bead of multiple ring-type or open loop shape, pass through
Welding bead is sequentially formed from Inside To Outside, can prevent from forming multiple welding bead with producing cracking on welding bead.As a result, can
Compared with the past, the more excellent laser weld joint of strength of joint is provided.In addition, by forming multiple ring-type or open loop shape
Welding bead, it is also possible to obtain corrosion resistance on the inside of welding bead and improve and other effects.
Brief description of the drawings
Fig. 1 is the figure of the outline for representing the multiple welding bead formed by method for laser welding of the invention, and (a) is solid
Figure, (b) is the figure of the A-A ' sections of expression (a).
Fig. 2 is of the hardness distribution of the welding point formed by method for laser welding of the invention.
Fig. 3 is the figure for illustrating the weld bead shape of ring-type welding bead.
Fig. 4 is the figure for illustrating the example of conventional multiple ring-type welding bead.
Fig. 5 is the figure for representing the example that the flange part of cap component is carried out laser welding using the welding bead of ring-type.
Specific embodiment
Hereinafter, on the implementation method of method for laser welding of the invention, refer to the attached drawing is described in detail.
First, on situation about being welded using circular welding bead, to the basic mode of welding method of the invention
Illustrate.
In the case of being welded to the overlapping portion of metallic plate 5 by laser welding, the characteristic of laser welding is played, such as schemed
Shown in 5, laser welding is carried out by with the track of sizable ring-type of nugget size in resistance welding.
In the technology of patent document 1, formed as the 1st welding bead 60 of basic welding bead, connect with the 1st welding bead 60 on the inside of it
The near or ground that overlaps forms the 2nd welding bead 61, welding bead is formed as multiple welding bead.Now, the 2nd welding bead for being formed in inner side sometimes
Upper generation longitudinal cracking.
The present inventors are observed by the plane of fracture and investigate its reason, are as a result understood, the longitudinal cracking of the 2nd welding bead is solidification
Cracking.In addition, the present inventors are studied the reason for cracking in solidification to the 2nd welding bead of inner side.
The result of the research of the present inventors finds that the welding bead of the 1st welding bead of ring-type is long, i.e., the welding bead of ring-type is straight
Footpath is bigger, then the tendency that the cracking of the 2nd welding bead occurs is more notable.In addition we know, the small situation of the diameter of the 1st welding bead or
In the case of forming the 2nd welding bead near the region at its center, will not also cause the generation of cracking.Thus, the present inventors consider
The reason for cracking occurs is as follows.
When 1 welding bead is formed, in the region surrounded in the welding bead, in the face vertical with thickness of slab direction, with weldering
The residual stress of stretching is produced on wiring direction at a right angle.If carrying out the 2nd in the region of residual stress for producing stretching
Welding, then the steel plate in the region adjacent with melting welding bead is disengaged constraint, therefore makes to melt under the influence of residual stress is stretched
Melt welding bead to stretch in the direction of the width and deform.Therefore, the 2nd welding bead is in process of setting, in welding bead before solidification terminates
It is upper to ftracture.
In addition, to not by the face vertical with thickness of slab direction in the region surrounded by the 1st welding bead generation, with welding
The influence of the residual stress that line side at a right angle is pulled up and the method that forms the 2nd welding bead are studied.
Result finds, by the welding bead in not inner side but after sequentially forming the 2nd welding bead on the outside of the 1st welding bead, can
Welded with preventing the cracking of the 2nd later welding bead.
Understand, in the case where multiple welding bead is formed, welding bead is sequentially formed by from Inside To Outside, can not be subject to
The welding bead 20 in outside is formed in the influence of the residual stress of the stretching of the inner side generation of welding bead before, therefore can not be produced
Ftracture and form multiple welding bead.
The present invention is, based on general principle as described above, further which to be studied and is completed.Hereinafter, join
Fig. 1 is examined, key element of the invention and preferred key element are illustrated.
(formation of the 1st welding bead)
In the present invention, multiple overlap to make metallic plate 5, and laser is irradiated in the welding precalculated position of the metallic plate to overlapping, multiple
, thus be welded to one another for the metallic plate of overlap by landform welding bead circlewise.
Now, in the present invention, first, to the welding position scanning laser for specifying, the 1st as the most welding bead of inner side is formed
Welding bead 10.As shown in figure 5, setting pad by multiple positions, welded structural element can be manufactured, here, to 1 position
Welding illustrate.
1st welding bead 10 is formed by the size of more than 3mm and below 15mm of such as external diameter.It should be noted that on institute
The shape of the welding bead of formation is as described later, but welding bead is not limited in circle, therefore the present invention, will be in the melting on the outside of connection welding bead
2 points of the maximum length of line segment is connected on the line of sealing wire (the toe of the weld portion in the outside of welding bead) as external diameter.
(formation of the later welding bead of the 2nd welding bead)
Then, to the exterior lateral area scanning laser of the 1st welding bead 10, the 2nd welding bead 20 and its later is formed laterally successively
Welding bead 30.In order to obtain necessary strength of joint, the later number of weld passes of the 2nd welding bead 20 is set to more than 2.
In the case of the welding of the structural elements for applying the present invention to such as automobile, outermost welding bead (most peripheral
Welding bead) its external diameter is preferably set to below 20mm.The reason for this is that the structural elements of automobile advances lightweight, Fig. 5 institutes
The width of coincidence part also narrows as the flange of the component for showing, and carries out Laser Welding at high speed to component by remote welding
Connect.
The width of the welding bead formed by laser is different according to the laser aid for being used, but usually 0.5~
1.5mm.The bar number of the welding bead that can be formed in 1 pad at position determines do not have by the purposes of welding point
Especially limitation.In the case where the welding of structural elements of above-mentioned automobile is applied the present invention to, if it is considered that most peripheral is welded
The external diameter and weld width in road, then be the largest of about 10 or so.
(hardness (in this specification, unless otherwise specified, then it represents that the case hardness of welding bead) of welding bead)
As described above, by forming welding bead, the welding bead of inner side softens, therefore the hardness of welding bead more then more increases in outside
It is high.The hardness of welding bead is to determine 6~8 points or so of Vickers hardness in the direction of the width according to weld width, is averaged.Pass through
Such hardness distribution is formed, the tensile shear strength of joint can be made to increase.
Fig. 2 is to use method for laser welding of the invention by 980MPa grades of steel plate with laser output power 4kW, speed of welding
4m/ minutes, the example being distributed the hardness that welding bead is formed as concentric circles in every 0.9 second with the order of φ 8mm, φ 16mm, φ 20mm
Son.Understand that the case hardness (average value) of each welding bead is followed successively by 274Hv, 289Hv, 356Hv from the welding bead of inner side, more laterally
It is mobile more to rise.
The hardness of each welding bead is not particularly limited, if but hardness is too low, the overall intensity decreases of welding point, therefore
Preferably more than 200Hv, more preferably more than 250Hv.If in addition, hardness is too high, cracking is easily produced in weld part, because
This is preferably below 700Hv, more preferably below 550Hv.
(configuration of welding bead)
When welding bead is formed as into multiple, have：I side that () is formed in the misaligned mode of any one in welding bead
Method；(ii) method formed in the way of the welding bead of inner side overlaps with the welding bead part on the outside of it.Any method by
Bonding area between metallic plate is caused by multiple welding bead increases, therefore can improve bond strength.
In the case where being formed in the way of welding bead is overlapped, by the way that most peripheral welding bead overlapped with the welding bead on the inside of it
Formed, make two welding bead zoariums, such that it is able to increase the weld width of the welding bead of most peripheral.On what is be subject in additional load-carrying
Stress, the welding bead highest of most peripheral, but by increasing the weld width of the welding bead of most peripheral, the knot of the welding bead of most peripheral can be made
The stress in conjunction portion relaxes such that it is able to further improve the bond strength of metallic plate.
(shaping age of the later welding bead of the 2nd welding bead)
The formation of multiple welding bead can be carried out by the way that the formation of each welding bead is continuously welded using remote welding.Outside
Welding bead formation preferably since the formation finish time of the welding bead on the inside of it is begun to pass through after more than 0.5 second.
If the time of the welding bead on the inside of formation is short, when the temperature of the welding bead of inner side begins to outside then when high
Welding bead formation, then the extensive region near weld part soften, therefore strength of joint reduction.Welding bead on the inside of formation
Elapsed time how long also have no problem, but the elapsed time is long also without particular advantage again, and productive temp time increases, production
Cost increases.
For example, being C content below 0.65%, preferably in the case of steel plate of the C content below 0.45%, passing through in metallic plate
Elapsed time (more than 0.5 second) is set between welding bead and welding bead, and than Ms point, (martensitic traoformation starts the temperature of the welding bead of inner side
Temperature) it is low more than 50 DEG C, produced by the welding bead on the outside of by being formed it is hot influenceed before, being generated in the welding bead of inner side is used for
Ensure the martensite of amount necessary to the intensity of weld part.In addition, in the welding bead in outside, the hot influence of the welding bead of inner side
Diminish, therefore formed sufficiently martensitic.
(shape of welding bead)
In the present invention, the welding bead of ring-type or open loop shape is formed by laser welding.The welding bead of ring-type refers to：The track of welding bead
It is circle, Long Circle, ellipse, polygonal welding bead；Or in their part with necking part shape, welding bead
Track is continuous, and the welding bead is around specific scope.The welding bead of open loop shape refers to：The track of welding bead is circle, Long Circle, ellipse
Shape, polygonal welding bead；Or in their part shape with necking part, the path portion ground of welding bead is not comprising connecting
Continuous portion, and the welding bead and connection welding bead and welding bead line segment around specific scope.
Fig. 3 is the example of the weld bead shape of the 3rd welding bead 30, and solid line represents welding bead, and dotted line represents the discontinuous portion 40 of welding bead.
Discontinuous portion can certainly be substituted for welding bead and form continuous pass.In Fig. 3, (a) represents oval welding bead, (b) expression
The welding bead of Long Circle, (c) represent in a part for Long Circle the welding bead with necking part, (d) represent polygonal welding bead,
E () represents circular welding bead.
In Fig. 3, the 3rd welding bead 30 is depicted in order to simplify, the 1st, 2 welding beads also substantially use and the 3rd weld bead shape phase
As welding bead.In addition, the 3rd welding bead outside further formed the 4th welding bead after welding bead in the case of, also preferably form with
The similar shape of 3rd welding bead.
It is to form opening portion on the involutory surface of steel plate that discontinuous portion 4 is formed on welding bead.For example, by galvanized steel plain sheet
When coincidence is welded, the coating between steel plate evaporates after reaching boiling point, and volume drastically expands.If welding bead area encompassed does not have
There is the passage of the coating as steam or gas, then the pressure between steel plate is improved, and molten bath dispels in welding, produced on welding bead
Defect.Therefore opening portion is formed on the involutory surface of steel plate, to discharge such pressure.
(width of welding bead)
As long as the width that the width welding bead of each welding bead does not burn, usually 0.5~1.5mm.
(welding procedure method)
In method for laser welding of the invention, for the multiple pads of the flange part etc. of cap component, it is possible to use (i) every 1
The method that point is sequentially formed multiple welding bead；(ii) after being continuously formed the 1st welding bead on multiple pads, the 1st is being formd
The 2nd welding bead, any one side in the method that the later welding bead of the 3rd welding bead is similarly formed are sequentially formed on the pad of welding bead
Method, is welded.
Particularly, in order to implement it is above-mentioned it is standby until after the temperature of the welding bead of inner side reaches less than -50 DEG C of Ms points
Its outside forms the 2nd, method of the 3rd welding bead, is suitably for the method for (ii).
Welded by remote laser, the multiple welding portion continuous high speed such as flange part of cap component can be welded
Connect.By such welding, form the 1st welding bead, it is standby until the temperature of the 1st welding bead reaches less than -50 DEG C of Ms points after,
Its outside forms the 2nd, the 3rd welding bead, in the method in this way singly welding welding position successively, total weldering
Time lengthening is connect, productive temp time increases.
In order to avoid the problem, in the case where multiple welding beads are formed, reflective mirror is used in light-gathering optics, utilized
The welding of remote laser that the movement of the light spot position of laser is completed in very short time, the is continuously formed in multiple welding positions
1 welding bead, thereby, it is possible to effectively utilize until forming the stand-by time of the 2nd welding bead.
That is, after being continuously formed the 1st welding bead on multiple welding positions, the mean temperature relative to the 1st welding bead reaches Ms
The welding portion of less than -50 DEG C of point, is continuously formed the 2nd welding bead, relative to the temperature of the 2nd welding bead reach -50 DEG C of Ms points with
Under welding portion, weld to form the 3rd welding bead likewise by remote laser with the 2nd welding bead, if so, then in order to standby
Time without irradiation laser shortens, as a result, total weld interval is reduced.
(welding condition)
Power density for forming the laser of laser weld joint of the invention, as long as according to the metallic plate for being welded
Material, thickness suitably determine.
For example, in the case where making thickness of slab be welded for the high-strength steel sheet of 0.5~3.0mm or so overlaps, laser
Power density be preferably 0.5MW/cm2Above and 500MW/cm2Following scope.
In the case of the example, power density is if 0.5MW/cm2More than, then can carry out laser beam insertion thickness of slab
Orifice type welding as direction.Even if in addition, in the range of slow speed of welding, it is also possible to the welding bead profit that will be formed before
The welding bead formed after is tempered.If power density is less than 0.5MW/cm2, then aperture will not be formed, therefore for reality
Show insertion welding, it is necessary to significantly reduce the translational speed of laser beam, i.e. speed of welding, thus it is unfavorable in actual production.Separately
On the one hand, it is higher than 500MW/cm in power density2In the case of, in light beam irradiation portion, evaporation turns into mastery, therefore cannot
Utilized as the thermal source of fusion weld, it is difficult to form welding bead.
(for the metallic plate of laser weld joint)
Metallic plate for laser weld joint of the invention is not particularly limited.But, when thickness of slab is thinning, although can obtain
Arranged by thickness of slab to the effect that the intensity of weld part is improved, but the intensity of joint, therefore the effect that the overall intensity of joint is improved
Fruit diminishes.Even if thickness of slab is thickening, it is also possible to obtain the effect of the intensity raising of the weld part produced by the present invention.
Method for laser welding of the invention is particularly suitable for effectively obtaining the effect of strength of joint raising, can also realize structure
Light-weighted, the thickness of slab of part are the coincidence welding of the high-strength steel sheet of the scope of 0.5~3.0mm.In addition, in high-strength steel sheet
In the case of, as described above, there is martensitic traoformation when being cooled down after the formation of welding bead, therefore strength of joint can be expected
Further improve.
In the present invention, as it appears from the above, by the multiple landform of laser welding circlewise or open loop shape welding bead, it is possible thereby to make
Make the laser weld joint that strength of joint is further improved, the corrosion resistance on the inside of welding bead is also improved.
It should be noted that the main welding to high Strength Steel for Motor Vehicles is illustrated in described above, but the present invention
Not limited to this.As purposes, it is also possible to be applicable in the component of other for motor vehicle component, household electrical appliances, building materials, ships etc..In addition,
Metallic plate is not limited to high-strength steel sheet, it is also possible to be applied to other steel, stainless steel, aluminium alloy, titanium alloy etc..
Embodiment
[embodiment 1]
Thickness of slab 1.0mm, steel plate principal component is set to be C：0.13%th, Si：0.9%th, Mn：2.2%th, P：0.01%th, S：
0.004% high-strength steel sheet 2 is overlapped, is engaged by laser welding, makes laser weld joint.In addition, similarly
Made use as the A5083 of the thickness of slab 1.2mm of 5000 line aluminium alloys joint and use as representative titanium alloy
The joint of the Ti-6%Al-4%V alloys of thickness of slab 1.0mm.
The shape of the welding bead of weld part is set to the shape shown in (a)~(e) of the circle or Fig. 3 for closing, except with 3
Outside bar or 4 joints of welding bead, the joint of welding bead only 1 is made.
Change shape, size, weld width, forming position of each welding bead of welding bead etc., make the laser of multiple species
Welding point.In a part of example, to make most peripheral welding bead be matched somebody with somebody with its inner side welding bead contact or Chong Die mode
Put.
Condition in the case of steel plate is shown in table 1 and table 2-1~2-5.In addition, by the bar in the case of aluminium alloy
Part is shown in table 3 and table 4-1~4-5, and the condition in the case of titanium alloy is shown in into table 5 and table 6-1~6-5.Welding bead is wide
Degree is set as all identical weld widths for every 1 pad.
External diameter on weld part, welding bead be shaped as circle in the case of, in the plate surface of irradiation laser side,
The external diameter of welding bead determined in the outside toe of the weld portion of welding bead is set to, in the case of the shape shown in (a)~(e) in Fig. 3,
The maximum length of the line segment for connecting on the line of the fusion weld wiring (the toe of the weld portion in outside) on the outside of connection welding bead at 2 points is made
It is the external diameter of welding bead, but is 20mm positioned at the constant diameter of outermost welding bead in either event.
It should be noted that table 1, table 3 and table 5 are corresponding with the situation that welding bead is fabricated to concentric circles, table 2-1~
5th, shape of the shape of the welding bead of table 4-1~5 and table 6-1~5 successively with (a)~(e) of Fig. 3 is corresponding.In addition, table 1~6
In underscore represent outside the scope for specifying in the present invention.
The condition of other welding is that laser output power is set as into 4.0kW, focal position are set as the table of upside steel plate
Beam spot diameter in face, focal position is set as 0.5mm.In addition, it is 4m/ minutes that speed of welding is constant.
On made laser weld joint, tested by X-ray transmission and confirm the presence or absence of cracking, determine tensile shear
Intensity (TSS) and cross tensile strength (CTS).
The assay method and joint geometry of tensile shear strength, according to the JIS Z for being related to joint for resistance spot welding to specify
3136, assay method and joint geometry on cross tensile strength, according to JIS Z 3137.That is, connect relative to made
Head, using the stretching clamp of regulation, draw speed is set as constant 10mm/ minutes, implementation tension test, by maximum now
Load-carrying is defined as tensile shear strength and cross tensile strength.
On concentric circles and the respective weld bead shapes of Fig. 3 (a)~(e), only to form 1 situation (steel of welding bead
Plate：No.5,12,18,24,30,36, aluminium alloy：No.43,50,56,62,68,74, titanium alloy：No.81、88、94、100、
106th, 112) under intensity on the basis of, will not only there is no cracking in welding bead and cross tensile strength reach more than 1.0 times of situation
It is judged as good, cross tensile strength less than 1.0 times or in welding bead is had a case that to ftracture, and it is bad to be judged as.
These results are shown in table 1~6.
From the result of table 1~6, in accordance with the invention it is possible to will not produce cracking, strength of joint excellent in obtaining welding bead
Laser weld joint.
Especially with regard to tensile shear strength, because the bonding area of the welding bead between steel plate increases, therefore observe big
The intensity of width is improved.
It should be noted that in the example of table 1~6, the No.2 on steel plate, 10,16,22,28,34, aluminium alloy
No.40,48,54,60,66,72, the No.78 of titanium alloy, 86,92,98,104,110, with the welding bead formed in outermost and its
The mode that a welding bead part for inner side overlaps is formed, and the welding bead of the example in addition to it is formed with the 1st welding bead with the outside of it
Welding bead in any one misaligned mode formed.
In contrast, in the case where necessary condition of the invention is unsatisfactory for, strength of joint be deteriorated compared to the present invention or
Ftractureed in welding bead.
No.6~8 on steel plate, 13,14,19,20,25,26,31,32,37,38, No.44~46 of aluminium alloy, 51,
52nd, 57,58,63,64,69,70,75,76, No.82~84 of titanium alloy, 89,90,95,96,101,102,107,108,113,
114, be the comparative example that welding point is formed by the welding bead of more than 3, due to the inner side of the 1st welding bead formed welding bead, therefore
No. 2 is ftractureed with generation in latter made welding bead, and when compared with example, tensile shear strength is significantly deteriorated.
No.7,8,19,25,32,38 of welding bead are formed particularly on steel plate, due to when the temperature of the 1st welding bead does not have
Have and the 2nd welding bead is formed when fully reducing, thus it is sufficiently martensitic without generation in the 1st welding bead, overbate, cross stretching
Intensity is also greatly reduced.
[embodiment 2]
In addition, assuming the narrow situation of flange part in welding steel, in order to carry out the present invention, (Japan is special with patent document 2
Open No. 2012-240086) comparing, the tensile shear investigated when the external diameter for being located at outermost welding bead is limited into 10mm is strong
Degree.It should be noted that stretching test method is based on the method in embodiment 1.
It is strong with the tensile shear in the situation (4 bicirculars, No.115) for being formed as concentric circles using 4 welding beads of the invention
On the basis of degree, the method as comparing, it is concentric to form 3 bicirculars (No.116) and 5 bicirculars (No.117) according to patent document 2
Result during round shape is shown in table 7.
In the case of 3 bicirculars, using the 1st welding bead as main weldering road, welding bead is assigned using the 2nd welding bead as compression domain, by the 3rd
Welding bead is used as the temper bead/ annealing bead for the 1st welding bead.In the case of 5 bicirculars, the situation further additional weldering to 3 bicirculars
Road, assigns welding bead, using the 5th welding bead as temper bead/ annealing bead using the 4th welding bead as compression domain.Between each welding bead since making to knot
The time of beam will meet the necessary condition of each invention, and the situation that the tensile shear strength of made joint is worse than benchmark is sentenced
Break as bad.
Cracking is not formed according in the present invention and the welding bead of the making of patent document 2, but in the case of 3 bicirculars,
Bonding area between steel plate is fewer than the present invention, therefore strength of joint is deteriorated.In addition, in the case of 5 bicirculars, due to by mutually away from
Limited area is formed from the welding bead for determining, the 3rd welding bead that will have been impacted once is welded again with the 5th welding bead, because sputtering
And cause the thickness in the thickness of slab direction of welding metal to reduce, compared with the present invention, strength of joint is deteriorated.
Industrial applicability
According to the present invention, the excellent laser weld joint of strength of joint compared with the past is can obtain, can apply to automobile
Component with component, other vehicle component, household electrical appliances, building materials, ships etc. etc., therefore industrial applicability is big.
Symbol description
1 laser weld joint
5 metallic plates
10 the 1st welding beads
20 the 2nd welding beads
30 the 3rd welding beads
The discontinuous portion of 40 welding beads
50 cap members
The flange part of 50a cap members
51 welding beads
60 the 1st welding beads of the prior art
61 the 2nd welding beads of the prior art
Claims (7)
1. a kind of laser weld joint, it is characterised in that be the welding point that multiple metallic plates for overlapping are welded,
The welding bead of ring-type or open loop shape with the 3 weight above,
The case hardness of welding bead increases from the welding bead of inner side welding bead laterally.
2. a kind of method for laser welding, it is characterised in that be by the way that multiple metallic plates are overlapped and irradiate laser, forms multiplely
The welding bead of ring-type or open loop shape, so as to the method for laser welding for being welded to one another the metallic plate of overlap, possesses：
The operation of the 1st welding bead of ring-type or open loop shape is formed by the irradiation of laser；With
In the outside of the 1st welding bead, the ring of the 2 weight above is further sequentially formed from Inside To Outside by the irradiation of laser
The operation of the welding bead of shape or open loop shape.
3. method for laser welding according to claim 2, it is characterised in that in the formation finish time of the welding bead from inner side
After beginning to pass through more than 0.5 second, start the formation of the welding bead on the outside of it.
4. the method for laser welding according to Claims 2 or 3, it is characterised in that the metallic plate is that C content is 0.65%
Following steel plate, the temperature for being formed in the welding bead on the inside of it of the later welding bead of the 2nd weight starts after reaching less than -50 DEG C of Ms points.
5. the method for laser welding according to any one of claim 2~4, it is characterised in that with the 1st welding bead with
Any one nonoverlapping mode in the welding bead that its outside is formed is formed.
6. the method for laser welding according to any one of claim 2~4, it is characterised in that the welding bead that outermost is formed
Formed in the way of being overlapped with the welding bead part on the inside of it.
7. the method for laser welding according to any one of claim 2~6, it is characterised in that welded by remote laser
Carry out the formation of the welding bead.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014191806 | 2014-09-19 | ||
| JP2014-191806 | 2014-09-19 | ||
| PCT/JP2015/076528 WO2016043278A1 (en) | 2014-09-19 | 2015-09-17 | Laser welded joint and laser welding method |
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| Publication Number | Publication Date |
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| CN106715035A true CN106715035A (en) | 2017-05-24 |
| CN106715035B CN106715035B (en) | 2019-07-30 |
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| CN201580050206.8A Active CN106715035B (en) | 2014-09-19 | 2015-09-17 | Laser weld joint and method for laser welding |
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|---|---|
| US (1) | US10722976B2 (en) |
| EP (1) | EP3195973B1 (en) |
| JP (1) | JP6690540B2 (en) |
| KR (1) | KR102057551B1 (en) |
| CN (1) | CN106715035B (en) |
| BR (1) | BR112017005084A2 (en) |
| CA (1) | CA2960753A1 (en) |
| MX (1) | MX2017003567A (en) |
| RU (1) | RU2682193C2 (en) |
| WO (1) | WO2016043278A1 (en) |
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| CN109465546A (en) * | 2018-02-27 | 2019-03-15 | 深圳市艾雷激光科技有限公司 | Open loop method for laser welding |
| CN110355471A (en) * | 2018-04-05 | 2019-10-22 | 丰田自动车株式会社 | Welding method |
| CN110394549A (en) * | 2018-04-25 | 2019-11-01 | 丰田自动车株式会社 | Method for laser welding |
| CN110936016A (en) * | 2018-09-25 | 2020-03-31 | 通用汽车环球科技运作有限责任公司 | Method and apparatus for laser welding |
| CN113165094A (en) * | 2018-11-22 | 2021-07-23 | 日立造船株式会社 | Butt welding method and butt welding equipment for extremely thick plates |
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| CN110392620B (en) * | 2017-02-09 | 2022-05-17 | 通用汽车环球科技运作有限责任公司 | Method for laser welding light metal workpieces comprising a surface oxide coating |
| CN110914014B (en) | 2017-06-13 | 2021-07-20 | 通用汽车环球科技运作有限责任公司 | Method for laser welding metal workpieces using a combination of welding paths |
| WO2019162726A1 (en) * | 2018-02-24 | 2019-08-29 | Secretary, Department Of Atomic Energy | An improved laser welding method for enhanced weld quality and enhanced surface smoothness |
| JP2019188407A (en) * | 2018-04-19 | 2019-10-31 | 株式会社神戸製鋼所 | Laser welded joint and method for production thereof |
| KR102603852B1 (en) * | 2019-03-28 | 2023-11-17 | 제이에프이 스틸 가부시키가이샤 | Lap laser weld joint and method for producing same, and automotive body structural member |
| CN111014363B (en) * | 2019-12-25 | 2022-06-17 | 天水锻压机床(集团)有限公司 | Double-layer combined type stand column of large bending machine and preparation method thereof |
| CN114512572B (en) * | 2022-02-18 | 2024-03-29 | 深圳赛能数字能源技术有限公司 | Solder strip prefabricated part and production method thereof, solder strip and production method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| RU2017113084A (en) | 2018-10-19 |
| EP3195973A4 (en) | 2018-07-11 |
| BR112017005084A2 (en) | 2017-12-05 |
| US20170274473A1 (en) | 2017-09-28 |
| JP6690540B2 (en) | 2020-04-28 |
| JPWO2016043278A1 (en) | 2017-06-22 |
| CA2960753A1 (en) | 2016-03-24 |
| EP3195973A1 (en) | 2017-07-26 |
| MX2017003567A (en) | 2017-07-14 |
| EP3195973B1 (en) | 2022-05-11 |
| RU2017113084A3 (en) | 2018-10-19 |
| US10722976B2 (en) | 2020-07-28 |
| KR20170038931A (en) | 2017-04-07 |
| CN106715035B (en) | 2019-07-30 |
| KR102057551B1 (en) | 2019-12-19 |
| WO2016043278A1 (en) | 2016-03-24 |
| RU2682193C2 (en) | 2019-03-15 |
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